thinking about forensic pathology, what, if any, would be the signs that a body or part of a body had been frozen and then thawed at some point?

cell damage.

 

upon freezing ice crystals form in the cells and grow out through the cell wall. a cell that has been frozen and is not capable of protecting itself against ice crystals(ie, human cells) will appear burst open.

ah i thought that might be the case, it's just that thawed meat doesn't appear to be falling apart or draining fluid or anything....

no, thats only because the remains of the cell walls still stick together and they make a very effective sponge due to a combination of their miniscule size and capillary pressure.

ah right ok thanks for your answers